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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A275987 Least k such that sigma(k) = sigma(n).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 6
12 12
13 13
14 14
15 14
16 16
17 10
18 18
19 19
20 20
21 21
22 22
23 14
24 24
25 16
26 20
27 27
28 28
29 29
30 30
31 21
32 32
33 33
34 34
35 33
36 36
37 37
38 24
39 28
40 40
41 20
42 42
43 43
44 44
45 45
46 30
47 33
48 48
49 49
50 50
51 30
52 52
53 34
54 54
55 30
56 54
57 57
58 40
59 24
60 60
61 61
62 42
63 63
64 64
65 44
66 66
67 67
68 68
69 42
70 66
71 30
72 72
73 73
74 74
75 48

List of values

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 6, 12, 13, 14, 14, 16, 10, 18, 19, 20, 21, 22, 14, 24, 16, 20, 27, 28, 29, 30, 21, 32, 33, 34, 33, 36, 37, 24, 28, 40, 20, 42, 43, 44, 45, 30, 33, 48, 49, 50, 30, 52, 34, 54, 30, 54, 57, 40, 24, 60, 61, 42, 63, 64, 44, 66, 67, 68, 42, 66, 30, 72, 73, 74, 48]

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